SOLUTION: could you please help me with a couple of problems? These are systems of equations(2 by 2) and we have to graph it.(the graphing method) 1) x + y = 1 3x + y = 7 2) 3x + 4

Algebra ->  Graphs -> SOLUTION: could you please help me with a couple of problems? These are systems of equations(2 by 2) and we have to graph it.(the graphing method) 1) x + y = 1 3x + y = 7 2) 3x + 4      Log On


   

Question 144931: could you please help me with a couple of problems? These are systems of equations(2 by 2) and we have to graph it.(the graphing method)
1) x + y = 1 3x + y = 7
2) 3x + 4y = 5 x - 2y = 5

Thank you in advance for your time and help Elle J
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
have to graph it.(the graphing method)
1) x + y = 1 3x + y = 7
y = -x + 1
Plot two points:
Let x = 0, then y = 1
Let x = 1, then y = 0
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y = -3x + 7
Let x = 0, then y = 7
Let x = 1, then y = 4
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-x%2B1%2C-3x%2B7%29
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2) 3x + 4y = 5 x - 2y = 5
y = (-3/4)x + (5/4)
Plot two points:
Let x = 0, then y = (5/4)
Let x = 1, then y = (1/4)
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y = (1/2)x - (5/2)
Plot two points:
Let x = 0, then y = (5/2)
Let x = 1, then y = -2
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Cheers,
Stan H.